"We first invaded Iraq because they invaded Kuwait," she said, complaining that now the US is planning on invading Iraq pre-emptively.

Mr Rubenson added: "We talk about how we believe in the rule of law and democracy and how we believe in peace and justice, and yet, we're doing exactly the same things that we accuse our enemies of doing."

He accused President George W Bush of imperialism, saying that the administration was pursuing policies that benefited the US and the US alone and felt it needs answer to no-one.

That echoed the sentiments expressed by many protesters who felt that attacking Iraq would not improve US security.

"It's a policy of paranoia," Ms Bright said.

"If there is something out there that we're worried about, we're going to make it happen if we strike first."